Friday, September 16, 2022
问题:电火花线切割加工中被切割的工件作为(),电极丝作为工具电极。电极...
Thursday, September 15, 2022
问题:容量为()kVA及以上的车间内油浸式变压器、容量为800kVA及...
Tuesday, September 13, 2022
问题:在选择电动机时,应根据负载机械特性选择电动机的容量。...
Thursday, September 15, 2022
问题:有一个额定电压为220V的电炉,想把它接在110V的电源上,若又...
Sunday, September 11, 2022
问题:根据楞次定律,图示电路中的开关S断开时,线圈中自感电动势的极性为...
Sunday, September 11, 2022
问题:对于单侧电源的双绕组变压器,常采用带制动线圈的差动继电器构成差动...
Sunday, September 11, 2022
问题:断路器的控制回路应满足下列要求之一是:应有电源监视,并宜监视跳、...
Sunday, September 11, 2022
问题:线路施工图是线路施工的依据和技术语言,也是对所建线路投运后长期运...
Sunday, September 11, 2022
Sunday, September 11, 2022
问题:纯电容正弦交流电路中,增大电源频率时,其它条件不变,电路中电流会...
Thursday, September 15, 2022
问题:设备在正常运行时,断路器跳闸的原因的哪些?如何处理?...
Thursday, September 15, 2022
问题:专门用于重复短时运行的交流异步电动机重复运行周期不大于()。...
Tuesday, September 13, 2022
Friday, September 16, 2022
Thursday, September 15, 2022
问题:10kV~35kV重要或规模较大的变电所,宜在电源进线断路器()...
Thursday, September 15, 2022
Thursday, September 15, 2022
问题:《电力法>规定:盗窃电能的,由电力管理部门责令停止违法行为,追缴...
Sunday, September 11, 2022
问题:当变电所的正上方﹑正下方为住宅﹑客房﹑办公室等场所时,变电所应作...
Saturday, September 17, 2022